Didcot pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Didcot is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will decrease; cypress, grass, and willow will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 33/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Moderate | 48/100 |
Local Environmental Conditions
The coastal fringe nearby is a notable secondary source, feeding pollen into town whenever the wind shifts to the inland. On top of that, birch and lime are the two species driving most tree pollen in Didcot, especially around parks and green corridors. Seasonal peaks tend to track the wider regional pattern, tree pollen leading in spring and grass through summer.
For Didcot, the season kicks off with birch and then hands things over to lime. After that, grass pollen carries the season from May through to September, with June and July normally the toughest stretch. Birch tends to release pollen between March and May, before lime takes over, usually May to July. Worth factoring in if hay fever's ever been an issue for you here.
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Frequently Asked Questions About Pollen in Oxfordshire
Is pollen high in Didcot right now?
On 20 September 2026, overall pollen levels in Didcot are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Didcot tomorrow?
On 21 September 2026, pollen conditions in Didcot will be similar to today, with artemisia at moderate levels
Is pollen expected to decrease in Didcot this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Didcot?
On 20 September 2026, Artemisia is the dominant pollen source in Didcot. cypress, grass, and willow are not currently active.
When is pollen season in Didcot?
How often is the Didcot pollen forecast updated?
The Didcot pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Didcot come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Didcot based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Didcot, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
